I thought to start this thread with a low-budget watch which is incredible nice and has a powerful and very trivial 19j movement which only consists of 51 parts (thus the name sistem51 by Swatch) and has a huge power reserve of about 90 hours. Moreover, the movement is from A to Z produced mechanically. However, it can't be serviced since the caseback is permanently sealed. Nevertheless, the movement should run for 10 - 20 years without any service according to Swatch group. Now have a look guys